Subject:
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RE: Don't use Lithium Ion (was Re: RCX battery cover)
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 3 Aug 1999 20:00:53 GMT
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Viewed:
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1379 times
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> Someone sent me an e-mail reply saying that they had used an external Lithium
> Ion battery pack to power their RCX, and that after a few days of use the RCX
> appeared to stop working, then they discovered that it only worked with
> internal batteries. In other words, they had permanently damaged the RCX by
> "burning out" the external power circuit.
It would be good to figure out exactly what the burnout mechanism was. does
any other external power source work?
I use a 4Ahr 12V rechargable gel-cel as used in many security panels, its
no-load voltage is about 13V and I have used it for a LONG time now developing
pbFORTH. I really doubt that 13V killed the RCX. I'd bet on the connector to the
external battery pack.
When using an external battery, ALWAYS put an inline fuse in the circuit to
reduce the chance of fire. Batteries are inherently dangerous. I guess putting
a series diode to drop the voltage another .7 V to 12.3 couldn't hurt
either...
Cheers,
Ralph Hempel - P.Eng
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Check out pbFORTH for LEGO Mindstorms at:
<http://www.hempeldesigngroup.com/lego/pbFORTH>
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Reply to: rhempel at bmts dot com
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Message is in Reply To:
 | | Don't use Lithium Ion (was Re: RCX battery cover)
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| Someone sent me an e-mail reply saying that they had used an external Lithium Ion battery pack to power their RCX, and that after a few days of use the RCX appeared to stop working, then they discovered that it only worked with internal batteries. (...) (26 years ago, 3-Aug-99, to lugnet.robotics)
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